Medical Quiz

Regulation of Heart Rate Quiz


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What factors can decrease heart rate?

A. high pH

B. low pH

C. high temperature

D. adrenaline

E. thyroxine


the acceleration of heartbeat is done by:

A. Somatic nervous system

B. autonomic nervous system

C. sympathetic nervous system

D. parasympathetic nervous system


Which part of the brain controls the autonomic activity of the heart?

A. Cerebral cortex

B. Medulla

C. Pituitary gland


Where are chemoreceptors located?

A. renal artery

B. carotid arteries

C. lungs

D. sinus


what are the receptors involved in changing heart rate?

A. baroreceptors and chemoreceptors

B. photoreceptors and baroreceptors


How does the body respond to an increase in CO2 conc?

A. No change in heart rate

B. increases heart rate

C. decreases heart rate


Chemoreceptors detect…?

A. Changes in pH

B. changes in temp.

C. changes in pressure


Which neurone increase the speed of your heart rate?

A. Parasympathetic

B. Sympathetic

C. Anaxonic


What is the AVN responsible for?

A. Opens up the valves to allow blood through

B. Passing Electrical Waves

C. Decreasing Blood Pressure


How does the body respond to an increase in blood pressure?

A. releases acetylcholine and decreases heart rate

B. releases noradrenaline and increases heart rate

C. releases noradrenaline and decreases heart rate


Baroreceptors detect….?

A. changes in pH

B. changes in temp.

C. changes in pressure


Does high blood pressure cause the heart rate to speed up or slow down?

A. speed up

B. slow down


what is the function of the bundle of HIS

A. coducts the waves of electrical activity between the ventricles to the apex

B. regulates heart rate

C. carries electrical waves to the muscular wall




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